I guess it's my CD's fault, installs to 1.0006 directly and doesn't have the original mods folder with mp_military_2.xdb0 in it. Installed a cracked version of the game (which I use to play 1.0004 or 1.0005) and it works

Already solved it, ty. I was actually looking if there is a line in the fsgame.ltx containing the word 'mods' to change to true but there wasn't. My mistake, I guess, was that there were some leftovers after I uninstalled and then I installed on top of that